RE: SECC MATERIAL

SECC is electrolytic zinc-plated steel as specified in the JIS spec, JIS G 3313. In a quick read through that spec, however, I did not find anything that would explain your "F20" callout. If there were an "E" followed by a number, that would refer to the minimum coating mass. Additionally, there are callouts for temper grade, chemical treatment, etc, but as near as I can tell, none of those use an "F." You might want to get your own copy of JIS G 3313 to see for yourself.

Is there any chance that the drawing you took this from is old and could have been writted per an outdated spec? That would be my only guess since this callout does not make sense per the 2005 spec that I have.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Resources

ENGINEERING.com surveyed 364 product development professionals to glean insights into how their teams are performing today, and what technologies are most useful to support their processes. Download Now

3D printing has quickly expanded beyond the realm of prototyping and into the world of end part manufacturing. Desktop 3D printers need not be used for making parts themselves, but as a secondary process for producing tools. Download Now

Creating tooling for injection molding is an expensive and complex proposition. Until recently, the only way to avoid tooling defects causing air traps, voids, shrinkage and the like was to employ a time-consuming and tedious physical prototyping process. Download Now